About a model of structural-phase transformations under hydrogen influence

Hydrogen embrittlement of materials is one of the important factors for an estimation of serviceability of designs. In spite of the fact that many works are devoted to research of hydrogen influence on properties of metals and alloys, there are enough “white” spots in this problem, in particular, the influence of kinetic processes inside a material, giving rise to hydrogen redistribution, on the basic strength characteristics at static and dynamic loading. The absence of an authentic mechanical model, whose description is based on the basic fundamental principles of rational mechanics, makes the problem rather actual, since, inherently, the presence of such a model would allow to describe the influence of internal kinetics on the macroparameters of a material, which is today extremely important in view of the huge amount of hypotheses which are ready to confirm only special experiments and do not allow to use them in other cases. The present work offers a model based on experimental data on the decrease in break energy of internuclear bonds at landing particles of hydrogen, i.e., the decrease in a level of the free energy. The offered model allows to explain the localization of hydrogen in the field of the increased concentration of stresses and change of material properties.